CN107202447A - A kind of carbon dioxide air source heat pump system for avoiding compressor from returning liquid impact - Google Patents
A kind of carbon dioxide air source heat pump system for avoiding compressor from returning liquid impact Download PDFInfo
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- CN107202447A CN107202447A CN201710498664.9A CN201710498664A CN107202447A CN 107202447 A CN107202447 A CN 107202447A CN 201710498664 A CN201710498664 A CN 201710498664A CN 107202447 A CN107202447 A CN 107202447A
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- oil return
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- liquid
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
Abstract
The invention discloses a kind of carbon dioxide air source heat pump system for avoiding compressor from returning liquid impact, belong to carbon dioxide heat-pump field, existing carbon dioxide air source heat pump system is at low ambient temperatures, heating capacity is decayed, efficiency declines, system oil return is bad, the present invention in existing carbon dioxide air source heat pump system by being additionally arranged oil return type gas-liquid separator, oil return casing tube evaporator type air cooler, when system carries out oil return work, liquid fluid and refrigerant in return line draw the heat in oil return casing tube evaporator type air cooler and obtaining evaporation makes oil atomization, liquid refrigerant is changed into gas, compressor is avoided to be caused damage because returning liquid impact, the stability of a system is improved while the life-span for extending compressor, reliability.
Description
Technical field
The invention belongs to carbon dioxide heat-pump technology, and in particular to a kind of carbon dioxide for avoiding compressor from returning liquid impact is empty
Air supply heat pump system.
Background technology
Traditional heat pump water heater system is mainly made up of compressor, choke valve, evaporator and condenser, groundwork
Principle is：Refrigerant absorbs the heat of cryogenic object in evaporator, flashes to gas media, the gas media that evaporator comes out
By the compression of compressor, it is changed into the gas media of HTHP, the gas media of HTHP within the condenser release heat energy
Put to high temp objects, while itself be changed into highly pressurised liquid media, the expanded valve expenditure and pressure of highly pressurised liquid Media Stream, then be changed into
Hot liquid media, into evaporator, so circulation.
With the raising of progress and the people's awareness of saving energy of science and technology, in recent years, Teat pump boiler market development is rapid, Europe
The dioxide region carbon air source hot pump water heater such as U.S., Japan is in the existing certain market capacity in market.Carbon dioxide air source heat
Increasing producer starts input research and development to pump water heater at home, heats because of its air source heat pump product at low ambient temperatures
Ability decays, and efficiency declines, and system oil return is bad.According to suction superheat control, i.e., the restricting element of air source heat pump is all
The temperature difference of evaporator outlet temperature and evaporator inlet temperature, environment temperature is lower, the refrigerant in system through evaporator from
The heat drawn in air is fewer, now to ensure certain degree of superheat, and restricting element will close less and less, in this feelings
The oil return of system can worse and worse under condition, and so operation goes down to cause compressor oil return bad and causes compressor to lose for a long time
Go lubrication, heavy wear and overheat and burn out.As country increasingly payes attention to energy-saving and emission-reduction, heat pump market increases far above warp
Ji increases, and particularly hot pump in low temp is increasingly favored.But problem of oil return when heat pump is heated under low temperature is to heat pump compared with low environment
At a temperature of heat reliability service and bring technical problem.
The content of the invention
The technical problem to be solved in the present invention is to overcome existing Teat pump boiler product in low temperature with the technical assignment proposed
Heat that oil return is bad under environment and oil return and meanwhile the problem of returning liquid there is provided a kind of carbon dioxide for avoiding compressor from returning liquid impact
Air source heat pump system, when making system hypothermia operation oil return, makes liquid fluid and the refrigeration accumulated in oil return type gas-liquid separator
Agent enters oil return casing tube evaporator type air cooler absorption heat and is evaporated, and oil atomization, liquid refrigerant is changed into gas, gas
State refrigerant and the fluid of atomization return to oil return type gas-liquid separator and are eventually returned to compressor operating, so as to avoid system because returning
Oil and cause system return liquid caused damage to compressor, extend compressor life-span while improve the stability of a system, reliability.
To reach above-mentioned purpose, of the invention avoids the carbon dioxide air source heat pump system that compressor returns liquid impact, bag
Compressor, economizer, choke valve, evaporator, magnetic valve, reservoir are included, described economizer has HTHP liquid refrigeration
Agent import, HTHP liquid refrigerant outlet, the first gaseous refrigerant import, the outlet of the first gaseous refrigerant, described height
Warm high pressure liquid refrigerant import is connected with HTHP liquid refrigerant outlet, described the first gaseous refrigerant import and the
One gaseous refrigerant outlet, it is characterized in that：
The carbon dioxide air source heat pump system also includes oil return casing tube evaporator type air cooler and oil return type gas-liquid separator；
The oil return casing tube evaporator type air cooler is provided with high temperature and high pressure gaseous refrigerant import, HTHP gas-liquid refrigerant
Outlet, oil return evaporation import, oil return evaporation outlet, cold water inlet, hot water outlet, described high temperature and high pressure gaseous refrigerant
Import and HTHP gas-liquid refrigerant outlet, described oil return evaporation import evaporate outlet with oil return, described
Cold water inlet is connected with hot water outlet；
Described oil return type gas-liquid separator includes tank body and the second gaseous refrigerant import on tank body, the second gaseous state system
Cryogen is exported and oil return outlet；
The outlet of the compressor is connected with described high temperature and high pressure gaseous refrigerant import, described HTHP gas-liquid refrigeration
Agent outlet is connected with HTHP liquid refrigerant inlet, described HTHP liquid refrigerant outlet and the reservoir
Import is connected, the outlet of the reservoir is connected through described choke valve with the import of the evaporator, and the evaporator goes out
Mouth is connected with the first described gaseous refrigerant import, described the first gaseous refrigerant outlet and the second described gaseous refrigerant
Agent import is connected, and described the second gaseous refrigerant outlet is connected with the import of the compressor；
Described oil return outlet connects described oil return through described magnetic valve and evaporates import, described oil return evaporation outlet connection
The second described gaseous refrigerant import；
Described magnetic valve is opened, and is deposited on the fluid of the oil return type gas-liquid separator bottom through described oil return outlet-electricity
Magnet valve-oil return evaporation import-oil return casing tube evaporator type air cooler-oil return evaporation outlet the-the second gaseous refrigerant import-oil return
The path of the gaseous refrigerant of type gas-liquid separator-the second outlet returns to compressor, and system carries out oil return work.
It is used as optimization technique means：Described oil return casing tube evaporator type air cooler is double-tube heat exchanger, described evaporation
Device is finned heat exchanger, and described economizer is double-tube heat exchanger.
It is used as optimization technique means：Described oil return casing tube evaporator type air cooler is changed including high temperature and high pressure gaseous refrigerant
The passage of heat, cold water heat recipient passage, oil return fluid heat absorption evaporation channel, the two ends of the high temperature and high pressure gaseous refrigerant heat exchanger channels
Described high temperature and high pressure gaseous refrigerant import and the outlet of HTHP gas-liquid refrigerant is set respectively, the cold water heat recipient passage
Two ends set described cold water inlet and hot water outlet respectively, and the two ends of the oil return fluid heat absorption evaporation channel set institute respectively
The oil return evaporation import and oil return evaporation outlet stated.
It is used as optimization technique means：The oil return casing tube evaporator type air cooler includes being sequentially sleeved in together to interior from outer
It is described oil return fluid heat absorption evaporation channel, institute in outside steel pipe, twisted shape copper pipe, heat exchange copper tube, described heat exchange copper tube
It is described cold water heat recipient passage to state between heat exchange copper tube and twisted shape copper pipe, is between the twisted shape copper pipe and outside steel pipe
Described high temperature and high pressure gaseous refrigerant heat exchanger channels；Described heat exchange copper tube is drawn out of described twisted shape copper pipe, described
Twisted shape copper pipe is drawn out of described outside steel pipe, described high temperature and high pressure gaseous refrigerant import and HTHP gas-liquid system
Cryogen exports the two ends for being connected to the outside steel pipe, and described oil return evaporation import and oil return evaporation outlet is formed respectively
At the two ends of the heat exchange copper tube, described cold water inlet and hot water outlet is respectively formed at the two of the twisted shape copper pipe
End.
It is used as optimization technique means：Described outside steel pipe, twisted shape copper pipe, heat exchange copper tube are coiled in the shape of a spiral.
It is used as optimization technique means：The second described gaseous refrigerant import and the outlet of the second gaseous refrigerant are located at described
At the top of the tank body of oil return type gas-liquid separator, described oil return outlet is located at the tank base of the oil return type gas-liquid separator,
The part that described oil return outlet is located in the oil return type gas-liquid separator is bent downwardly and as close to the oil return type
The bottom of gas-liquid separator inner tank wall.
It is used as optimization technique means：The inner of the second gaseous refrigerant import is extended in the tank body through straight tube
Top simultaneously bends side wall to the tank body.
It is used as optimization technique means：The inner of the second gaseous refrigerant outlet is extended in the tank body through U-tube
Top, the lower end of the U-tube is located at the bottom of the tank body.
It is used as optimization technique means：The tube wall of the U-tube is provided with through hole, is that described through hole configuration stops net.
The beneficial effects of the invention are as follows：Evaporated by setting up oil return sleeve pipe in existing carbon dioxide air source heat pump system
Type air cooler, oil return type gas-liquid separator, magnetic valve is opened when system oil return works, and accumulates in oil return type gas-liquid separator bottom
The liquid fluid and refrigerant in portion are exported out from oil return, and import, liquid are evaporated into the oil return of oil return casing tube evaporator type air cooler
State fluid and refrigerant absorb heat evaporation from oil return casing tube evaporator type air cooler, export out as mist from oil return evaporation afterwards
Carburetion, gaseous refrigerant, the gaseous refrigerant import for entering back into oil return type gas-liquid separator carry out gas-liquid separation, then gaseous state
Refrigerant and fogging oil are returned in compressor together, so as to realize lubrication compressor, it is to avoid compressor is because returning liquid impact or oil starvation
Cause damage, the stability of a system, reliability are improved while extending the life-span of compressor.
Because the present invention relative to existing carbon dioxide air source heat pump system is additionally arranged oil return casing tube evaporator type air cooling
Device, oil return type gas-liquid separator, it is ensured that restricting element is maintained at suitable aperture during certain degree of superheat, it is ensured that benign time of system
Oil.
Brief description of the drawings
Fig. 1 avoids the schematic diagram of the carbon dioxide air source heat pump system of compressor time liquid impact for the present invention；
Fig. 2 is oil return casing tube evaporator type air cooler schematic diagram of the present invention；
Fig. 3 is the enlarged diagram of the air cooler a port of oil return casing tube evaporator type shown in Fig. 2 part；
Fig. 4 is oil return type gas-liquid separator schematic diagram of the present invention；
Label declaration in figure：
1- compressors；
2- oil return casing tube evaporator type air coolers：21- high temperature and high pressure gaseous refrigerant imports, 22- HTHP gas-liquid refrigerants
Outlet, 23- oil returns evaporation import, 24- oil returns evaporation outlet, 25- cold water inlets, 26- hot water outlets, 27- HTHPs
Steel pipe, 211- on the outside of gaseous refrigerant heat exchanger channels, 28- cold water heat recipient passages, 29- oil returns fluid heat absorption evaporation channel, 210-
Twisted shape copper pipe, 212- heat exchange copper tubes；
3- economizers：31- HTHP liquid refrigerant inlets, 32- HTHP liquid refrigerant outlets, the gaseous states of 33- first
Refrigerant inlet, the outlet of the gaseous refrigerants of 34- first；
4- choke valves；
5- evaporators；
6- oil return type gas-liquid separators：61- the second gaseous refrigerant imports, the gaseous refrigerants of 62- second outlet, 63- oil returns go out
Mouthful, 64- tank bodies, 65- backstops；
7- magnetic valves；
8- reservoirs.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described.
As shown in figure 1, the present invention avoids compressor from returning the carbon dioxide air source heat pump system that liquid impacts, including compressor
1st, economizer 3, choke valve 4, evaporator 5, magnetic valve 7, reservoir 8, economizer 3 have HTHP liquid refrigerant inlet
31st, HTHP liquid refrigerant outlet 32, the first gaseous refrigerant import 33, the first gaseous refrigerant outlet 34, high temperature is high
Hydraulic fluid state refrigerant inlet 31 is connected with HTHP liquid refrigerant outlet 32, the first gaseous refrigerant import 33 and the first gas
State refrigerant outlet 34 is connected；
The carbon dioxide air source heat pump system is also included shown in oil return casing tube evaporator type air cooler 2 and Fig. 4 shown in Fig. 2
Oil return type gas-liquid separator 6；
Oil return casing tube evaporator type air cooler 2 is provided with high temperature and high pressure gaseous refrigerant import 21, HTHP gas-liquid refrigerant
Outlet 22, oil return evaporation import 23, oil return evaporation outlet 24, cold water inlet 25, hot water outlet 26, high pressure gaseous system
Cryogen import 21 is connected with HTHP gas-liquid refrigerant outlet 22, and oil return is evaporated import 23 and connected with oil return evaporation outlet 24,
Cold water inlet 25 is connected with hot water outlet 26；
Oil return type gas-liquid separator 6 includes tank body（64）And the second gaseous refrigerant import 61, the gaseous state agent on tank body go out
Mouth 62 and oil return outlet 63；
The outlet of compressor 1 is connected with high temperature and high pressure gaseous refrigerant import 21, HTHP gas-liquid refrigerant outlet 22 and height
Warm high pressure liquid refrigerant import 31 is connected, and HTHP liquid refrigerant outlet 32 is connected with the import of reservoir 8, reservoir
8 outlet is connected through choke valve 4 with the import of evaporator 5, and the outlet of evaporator 5 is connected with the first gaseous refrigerant import 33,
First gaseous refrigerant outlet 34 is connected with the second gaseous refrigerant import 61, the second gaseous refrigerant outlet 62 and compressor 1
Import connection；
Oil return outlet 63 is through the connection oil return evaporation import 23 of magnetic valve 7, and oil return evaporation outlet 24 connects the second gaseous refrigerant and entered
Mouth 61；
Magnetic valve 7 is opened, and the fluid for being deposited on the bottom of oil return type gas-liquid separator 6 exports 63- magnetic valve 7- oil returns steaming through oil return
Send out import 23- oil return casing tube evaporator type air cooler 2- oil returns evaporation outlet 24- the second gaseous refrigerant import 61- oil return type gas
The path of the gaseous refrigerants of liquid/gas separator 6- second outlet 62 returns to compressor, and system carries out oil return work.
Specifically, oil return casing tube evaporator type air cooler 2 is double-tube heat exchanger, evaporator 5 is finned heat exchanger, economizer
3 be double-tube heat exchanger.Referring to Fig. 2, oil return casing tube evaporator type air cooler 2 includes high temperature and high pressure gaseous refrigerant heat exchanger channels
27th, cold water heat recipient passage 28, oil return fluid heat absorption evaporation channel 29, the two ends point of high temperature and high pressure gaseous refrigerant heat exchanger channels 27
High temperature and high pressure gaseous refrigerant import 21 and HTHP gas-liquid refrigerant outlet 22, the two ends point of cold water heat recipient passage 28 are not set
Cold water inlet 25 and hot water outlet 26 are not set, and the two ends of oil return fluid heat absorption evaporation channel 29 set oil return evaporation import respectively
23 and oil return evaporation outlet 24.
Oil return casing tube evaporator type air cooler 2 is included from outer to interior outside steel pipe 210, the twisted shape copper being sequentially sleeved in together
Pipe 211（Inwall, outer wall are in shape of threads）, heat exchange copper tube 212, absorbed heat evaporation channel 29 for oil return fluid in heat exchange copper tube 212,
It is cold water heat recipient passage 28 between heat exchange copper tube 212 and twisted shape copper pipe 211, between twisted shape copper pipe 211 and outside steel pipe 210
For high temperature and high pressure gaseous refrigerant heat exchanger channels 27；Heat exchange copper tube 212 is drawn out of twisted shape copper pipe 211, twisted shape copper pipe 211
Drawn in from outside steel pipe 210, high temperature and high pressure gaseous refrigerant import 21 and HTHP gas-liquid refrigerant outlet 22 connect respectively
The two ends of outside steel pipe 210 are connected on, oil return evaporation import 23 and oil return evaporation outlet 24 are respectively formed at the two of heat exchange copper tube 212
End, cold water inlet 25 and hot water outlet 26 are respectively formed at the two ends of twisted shape copper pipe 211.The outside steel pipe being nested together
210th, twisted shape copper pipe 211, heat exchange copper tube 212 are coiled in the shape of a spiral, can increase stream in oil return casing tube evaporator type air cooler 2
The path of body, increases heat transfer effect；And twisted shape copper pipe 211 then has bigger heat exchange surface area, it is situated between beneficial to inside and outside it
Matter exchanges heat, and its shape makes water form turbulent flow to reach optimal heat transfer effect.
Second gaseous refrigerant import 61 and the second gaseous refrigerant outlet 62 are located at the tank body of oil return type gas-liquid separator 6
64 tops, oil return outlet 63 is located at the bottom of tank body 64 of oil return type gas-liquid separator 6, and oil return outlet 63 is located at oil return type gas-liquid point
It is bent downwardly and as close to the bottom of the inner tank wall of oil return type gas-liquid separator 6 from the part in the tank body 64 of device 6.Oil return type
The maximum working pressure of gas-liquid separator 6 is designed as 13MPa.
The inner top extended to through straight tube in tank body 64 of second gaseous refrigerant import 61 is simultaneously bent to tank body 64
Side wall, the gaseous state prevented into or liquid state refrigerant are directly entered the U-tube top entry of the second gaseous refrigerant outlet 62；
The top that the inner of second gaseous refrigerant outlet 62 is extended in tank body 64 through U-tube, the lower end of U-tube is located at tank body 64
Bottom, the tube wall of U-tube is provided with through hole, is that through hole configuration stops net 65, stops that net 65 can effective barrier system inside impurity
Particulate matter enters compressor, so as to play a part of protecting compressor.
Avoided shown in Fig. 1 compressor return liquid impact carbon dioxide air source heat pump system, operation principle it is as follows：
The gaseous refrigerant for the low-temp low-pressure that flash-pot 5 comes out enters the heat of refrigerant in extraction system in economizer 3, inhales
Take the low-temp low-pressure gaseous refrigerant after heat to enter in oil return type gas-liquid separator 6 and carry out gas-liquid separation, then gaseous refrigerant
Agent is returned to be compressed in compressor 1；And the liquid refrigerant of the HTHP come out from oil return casing tube evaporator type air cooler 2
By being cooled down with water coke slurry heat（Condensation）Afterwards, enter in economizer 3 that high temperature is high through HTHP liquid refrigerant inlet 31
The latent heat of compression refrigerant passes to the gaseous refrigerant that evaporator comes out, from the HTHP liquid refrigerant outlet of economizer 3
The liquid refrigerant of 32 cryogenic high pressure out enters in reservoir 8, into the liquid refrigeration of the cryogenic high pressure in reservoir 8
Agent, highly pressurised liquid refrigerant flows through expansion valve reducing pressure by regulating flow, then is changed into superheated liquid refrigerant, into evaporator, so circulation.
Work as low-temperature heating, when system oil return is bad, magnetic valve 7 is opened in system, be deposited on the bottom of oil return type gas-liquid separator 6
The liquid fluid and refrigerant in portion flow through magnetic valve 7 from oil return outlet 63 and enter oil return evaporation import 23, liquid fluid and refrigeration
Agent absorbed heat in oil return casing tube evaporator type air cooler 2 evaporation after turn into fogging oil, gaseous refrigerant, from oil return evaporation outlet 24
Compressor is returned to, so that carbon dioxide air source source pump will be accumulated in well when compared with being run under low ambient temperature
Oil in system container is returned in compressor, makes reliably to be lubricated all the time in compressor operation, extension compressor
The stability of a system, reliability are improved while life-span.
Described oil return casing tube evaporator type air cooler has gas cooler, oil return evaporator function concurrently and is integrated, and it steams
While the heat that liquid refrigerant when beaming back oil in fluid passes through in aspiration cannula is changed into gaseous refrigerant, system is carried out just
Normal cooling heat transferring, greatly promotes the service life of compressor, improves system stabilization, reliability.
It is described above, it is only the present invention preferably embodiment, but the scope of the present invention is not limited thereto, it is any
Those familiar with the art is in the technical scope of present disclosure, the change or replacement that can be readily occurred in, and all should
It is included within the scope of the present invention.Therefore the scope of the present invention is defined by the protection domain of claims.
Claims (9)
1. a kind of carbon dioxide air source heat pump system for avoiding compressor from returning liquid impact, including compressor（1）, economizer（3）、
Choke valve（4）, evaporator（5）, magnetic valve（7）, reservoir（8）, described economizer（3）With HTHP liquid refrigerant
Import（31）, HTHP liquid refrigerant outlet（32）, the first gaseous refrigerant import（33）, the first gaseous refrigerant outlet
（34）, described HTHP liquid refrigerant inlet（31）With HTHP liquid refrigerant outlet（32）Connection, it is described
First gaseous refrigerant import（33）Exported with the first gaseous refrigerant（34）Connection, it is characterized in that：
The carbon dioxide air source heat pump system also includes oil return casing tube evaporator type air cooler（2）With oil return type gas-liquid separator
（6）；
The oil return casing tube evaporator type air cooler（2）It is provided with high temperature and high pressure gaseous refrigerant import（21）, HTHP gas
Liquid refrigerant outlet（22）, oil return evaporation import（23）, oil return evaporation outlet（24）, cold water inlet（25）, hot water outlet
（26）, described high temperature and high pressure gaseous refrigerant import（21）Exported with HTHP gas-liquid refrigerant（22）Connection, it is described
Import is evaporated in oil return（23）Evaporate and export with oil return（24）Connection, described cold water inlet（25）With hot water outlet（26）Even
It is logical；
Described oil return type gas-liquid separator（6）Including tank body（64）And the second gaseous refrigerant import on tank body
（61）, the second gaseous refrigerant outlet（62）With oil return outlet（63）；
The compressor（1）Outlet and described high temperature and high pressure gaseous refrigerant import（21）Connection, described HTHP
Gas-liquid refrigerant is exported（22）With HTHP liquid refrigerant inlet（31）Connection, described HTHP liquid refrigerant goes out
Mouthful（32）With the reservoir（8）Import connection, the reservoir（8）Outlet through described choke valve（4）Steamed with described
Send out device（5）Import connection, the evaporator（5）Outlet and described the first gaseous refrigerant import（33）Connection, it is described
The first gaseous refrigerant outlet（34）With the second described gaseous refrigerant import（61）Connection, the second described gaseous refrigerant
Agent is exported（62）With the compressor（1）Import connection；
Described oil return outlet（63）Through described magnetic valve（7）The described oil return evaporation import of connection（23）, described oil return
Evaporation outlet（24）The second described gaseous refrigerant import of connection（61）；
Described magnetic valve（7）Open, be deposited on the oil return type gas-liquid separator（6）The fluid of bottom goes out through described oil return
Mouthful（63）- magnetic valve（7）Import is evaporated in-oil return（23）- oil return casing tube evaporator type air cooler（2）- oil return evaporation outlet（24）-
Second gaseous refrigerant import（61）- oil return type gas-liquid separator（6）- the second gaseous refrigerant is exported（62）Path return to pressure
Contracting machine, system carries out oil return work.
2. the carbon dioxide air source heat pump system according to claim 1 for avoiding compressor from returning liquid impact, it is characterized in that：
Described oil return casing tube evaporator type air cooler（2）For double-tube heat exchanger, described evaporator（5）It is described for finned heat exchanger
Economizer（3）For double-tube heat exchanger.
3. the carbon dioxide air source heat pump system according to claim 1 for avoiding compressor from returning liquid impact, it is characterized in that：
Described oil return casing tube evaporator type air cooler（2）Including high temperature and high pressure gaseous refrigerant heat exchanger channels（27）, cold water heat absorption it is logical
Road（28）, oil return fluid heat absorption evaporation channel（29）, the high temperature and high pressure gaseous refrigerant heat exchanger channels（27）Two ends difference
If described high temperature and high pressure gaseous refrigerant import（21）With the outlet of HTHP gas-liquid refrigerant（22）, the cold water absorbs heat logical
Road（28）Two ends set described cold water inlet respectively（25）And hot water outlet（26）, the oil return fluid heat absorption, which is evaporated, leads to
Road（29）Two ends set described oil return evaporation import respectively（23）Evaporate and export with oil return（24）.
4. the carbon dioxide air source heat pump system according to claim 3 for avoiding compressor from returning liquid impact, it is characterized in that：
The oil return casing tube evaporator type air cooler（2）Including from outer to the interior outside steel pipe being sequentially sleeved in together（210）, twisted shape copper
Pipe（211）, heat exchange copper tube（212）, described heat exchange copper tube（212）Interior is described oil return fluid heat absorption evaporation channel（29）,
The heat exchange copper tube（212）With twisted shape copper pipe（211）Between be described cold water heat recipient passage（28）, the twisted shape copper pipe
（211）With outside steel pipe（210）Between be described high temperature and high pressure gaseous refrigerant heat exchanger channels（27）；Described heat exchange copper tube
（212）From the twisted shape copper pipe（211）It is interior to draw, described twisted shape copper pipe（211）From described outside steel pipe（210）It is interior
Draw, described high temperature and high pressure gaseous refrigerant import（21）With the outlet of HTHP gas-liquid refrigerant（22）It is connected to institute
State outside steel pipe（210）Two ends, described oil return evaporation import（23）Evaporate and export with oil return（24）It is respectively formed at described
Heat exchange copper tube（212）Two ends, described cold water inlet（25）And hot water outlet（26）It is respectively formed at the twisted shape
Copper pipe（211）Two ends.
5. the carbon dioxide air source heat pump system according to claim 4 for avoiding compressor from returning liquid impact, it is characterized in that：
Described outside steel pipe（210）, twisted shape copper pipe（211）, heat exchange copper tube（212）Coil in the shape of a spiral.
6. the carbon dioxide air source heat pump system according to claim 1 for avoiding compressor from returning liquid impact, it is characterized in that：
The second described gaseous refrigerant import（61）With the outlet of the second gaseous refrigerant（62）It is located at the oil return type gas-liquid separator
（6）Tank body（64）Top, described oil return outlet（63）It is located at the oil return type gas-liquid separator（6）Tank body（64）Bottom
Portion, described oil return outlet（63）Positioned at the oil return type gas-liquid separator（6）Interior part be bent downwardly and as close to
The oil return type gas-liquid separator（6）Tank body（64）The bottom of inwall.
7. the carbon dioxide air source heat pump system according to claim 6 for avoiding compressor from returning liquid impact, it is characterized in that：
The second gaseous refrigerant import（61）The inner extend to the tank body through straight tube（64）Interior top is simultaneously bent to described
Tank body（64）Side wall.
8. the carbon dioxide air source heat pump system according to claim 6 for avoiding compressor from returning liquid impact, it is characterized in that：
The second gaseous refrigerant outlet（62）The inner extend to the tank body through U-tube（64）Interior top, the U-tube
Lower end is located at the tank body（64）Bottom.
9. the carbon dioxide air source heat pump system according to claim 8 for avoiding compressor from returning liquid impact, it is characterized in that：
The tube wall of the U-tube is provided with through hole, is that described through hole configuration stops net.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710498664.9A CN107202447A (en) | 2017-06-27 | 2017-06-27 | A kind of carbon dioxide air source heat pump system for avoiding compressor from returning liquid impact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710498664.9A CN107202447A (en) | 2017-06-27 | 2017-06-27 | A kind of carbon dioxide air source heat pump system for avoiding compressor from returning liquid impact |
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| CN107202447A true CN107202447A (en) | 2017-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710498664.9A Withdrawn CN107202447A (en) | 2017-06-27 | 2017-06-27 | A kind of carbon dioxide air source heat pump system for avoiding compressor from returning liquid impact |
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| CN (1) | CN107202447A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591014A (en) * | 2018-05-16 | 2018-09-28 | 深圳汇呈环保科技有限公司 | Compressor and refrigerating plant with it |
| CN111207453A (en) * | 2020-01-09 | 2020-05-29 | 珠海格力电器股份有限公司 | Air conditioner external unit, air conditioning equipment and refrigeration oil recovery control method |
-
2017
- 2017-06-27 CN CN201710498664.9A patent/CN107202447A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591014A (en) * | 2018-05-16 | 2018-09-28 | 深圳汇呈环保科技有限公司 | Compressor and refrigerating plant with it |
| CN108591014B (en) * | 2018-05-16 | 2019-02-15 | 安徽海立精密铸造有限公司 | Compressor and refrigerating plant with it |
| CN111207453A (en) * | 2020-01-09 | 2020-05-29 | 珠海格力电器股份有限公司 | Air conditioner external unit, air conditioning equipment and refrigeration oil recovery control method |
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Application publication date: 20170926 |